Monitoring Point of External Wind Velocity Around Building Roof Top for Natural Ventilation Control

ABSTRACT In order to measure external approaching wind velocity and direction for controlling natural ventilation (NV), anemometers are often installed at the roof top of mid‐ to high‐rise buildings. However, due to the complex flow field around roof top caused by separation flow, the accuracy of the measurement is not well‐known. The final goal of this research is to propose an advanced method for controlling NV operation. By conducting PIV and CFD, the results of the accuracy of estimation of external wind direction and velocity at measuring points based on the data regarding horizontal distribution are shown in this paper.